J. R. R. Tolkien as a role-player:

There was a custom at King Edward's of holding a debate entirely in Latin, but that was almost too easy for Tolkien, and in one debate when taking the role of Greek Ambassador to the Senate he spoke entirely in Greek. On another occasion he astonished his schoolfellows when, in the character of a barbarian envoy, he broke into fluent Gothic; and on a third occasion he spoke in Anglo-Saxon.

Old Man Willow: In Praise of Escapism